Improvement in cutters for trimming the soles of boots and shoes



C. F. DAVIS E. P. HUWE. l Cutters fur'Trivmmivng the Soles @mf Boots and Shes. vNO 1527428l v Patentedjuly 2211874,

UNITED STATES CHARLES F. DAVIS ND EDWARD P. HOWE, OF MARLBOROUGH,

PATENT OFFICE..

MAss.

IMPROVEMENT IN CUTTERS FOR TRIMMING THE SOLES OE BOOTS AND SHOES..

`Specification forming'part of Lettere Patent No. 152,728, dated July 7, 1874,; application filed May 16, 1&574. l

To all whom it may concern:

Be it known that we, CHARLns F. DAVIS and EDWARD P. HOWI., both of Marlborough, in the county of Middlesex and State of Massachusetts, have invented a Rotary Gutter for Trimming the Soles and Heels of Boots and Shoes, and for taking oft' the upper edges of the soles, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a perspective view of our rotary cutter. Fig. 2 is a vertical section through the same, taken in a plane passing through its axis. Fig. 3 isa vertical section taken in a plane at right angles to its axis. Fig. 4 is a sectional detail. Fig. 5 is a perspective view of one of the cutters we employ.

Our invention consists in a revolving cutter head or holder, provided with one or more knives for tak-ing ott' the upper edge of the sole of a boot or shoe. Our invention also consists in the peculiar construction of the revolving cutter head or holder with one or more knives for trimming the outer edge of the sole or heel, and their relation to each other, as hereinafter shown and described, by which construction the two operations of taking off the upper edge of the sole and trimming its outer edge can be performed simultaneously in a convenient and expeditious manner, thus effecting a great saving in time and labor, the knife for trimming the outer edge of the sole being provided, if desired, with a raisedlip or ange for forming the bead at the base of the upper edge, and the rotary head or holder being made in one or more portions, provided with a projecting flange, which. serves as a guard for the upper and as a guide for the sole, the head or holder being so constructed as to admit of the ready adjustment of the knives, and of their removal when they require to be sharpened.

To enable others skilled in the art to understand and use our invention, we will proceed to describe the manner in which we have carried it out.

In the said drawings, A represents the holder, composed of three circular portions, a b c, secured together, the two outer portions a and c being of larger diameter than the i11- termediate portion b, thereby forming iianges,

which serve as guides for the sole or heel to be trimmed after it is applied to the boot or shoe. The outer surface of the central portion b is recessed out at two points diametrically opposite for the reception of two curved blades or cutters, d, which snugly t within their recesses, the inner surfaces of the outer portions a c being provided with grooves for the opposite sides of the cutters d to rest in, whereby they are held securely in position, as desired. h It are two holes cut through the three portions a b c, each of these holes being of greater diameter at the outer surface of the portion c, and tapering in toward the outer surface of the portion a, the centers of the holes being diametrically opposite, and communicating with openings i, formed under the cutting-edges of the blades or cutters d, the holes h, in connection with the openings serving as throats, through which the chips trimmed from the outer edge of the sole or heel may be allowed to escape. The outer surface of each cutter d, contiguous to the portion a, is provided with a raised lip or ridge, k, having its forward extremity sharpened, so as to form the bead around the sole just below the base of what is well known as the upper edge.

When the cutters d for trimming the outer edge of the sole and forming the bead are dull,

they may be removed by unscrewing and taking off the portion c from the portionsI a b, and

be ground off on their under sides in a ready and convenient manner. At two points diametrically opposite, through the outer portion a of the holder, are cut openings l, extending out to its periphery, and within each of these openings is placed a knife, m, for taking oi' the upper edge of the sole, a screw, n, passing through the knife, (into the central portion b of the holder,) being employed for clamping the knife in such position as to cause its cutting-edge to project slightly inside the plane of the inner surface of the portion a, in which it rests. One side of the knife mis square, and abuts against the corresponding square side of its opening l, whereby the knite is prevented, while revolving, 'rom moving out of place when adjusted. The center ofthe holder is provided with a circular hole, p, to allow of its Vbeing slipped onthe shaftonwhich it is to reVolve,-'and thefholder maybe composed of one or more portions, and the knives for taking off the upper edge of the sole may be of a dierent form than that shown in Fig. l; for instance, each knife vmay be straight, und be placed within a rectangular slot formed in the portion 0b, or right angular, and'have its base or stock secured in arecess cut in the surface of the periphery of the middle portion b of the holder.

The number of each of the two kinds of knives may be varied at pleasure, and instead of a curved knife for'trimming the outer edge of the sole, a straight or other-shaped knife may be employed Without departing from the spirit of our invention.

CHARLES F. DAVIS. EDWARD P. HOWE.

In presence of- N. W. STEARNs, W. J. CAMBRIDGE. 

